Create Grid plot collection and allow creation of new combination plots

ApplicationCode/UserInterface/RiuPlotMainWindow.h

@@ -80,6 +80,7 @@ public:
     void addToTemporaryWidgets( QWidget* widget );
 
     void updateWellLogPlotToolBar();
+    void updateGridPlotWindowToolBar();
     void updateSummaryPlotToolBar( bool forceUpdateUi = false );
     void setFocusToLineEditInSummaryToolBar();
 
@@ -120,6 +121,7 @@ private:
     QMenu* m_windowMenu;
 
     caf::PdmUiToolBarEditor*                     m_wellLogPlotToolBarEditor;
+    caf::PdmUiToolBarEditor*                     m_gridPlotWindowToolBarEditor;
     caf::PdmUiToolBarEditor*                     m_summaryPlotToolBarEditor;
     std::unique_ptr<caf::PdmUiDragDropInterface> m_dragDropInterface;